2 files changed, 15 insertions, 20 deletions

diff --git a/src/client/util/InteractionUtils.ts b/src/client/util/InteractionUtils.ts
index c24c70bca..7390890c6 100644
--- a/src/client/util/InteractionUtils.ts
+++ b/src/client/util/InteractionUtils.ts
@@ -53,7 +53,7 @@ export namespace InteractionUtils {
      * @param oldPoint2 - previous point 2
      */
     export function Pinching(pt1: React.Touch, pt2: React.Touch, oldPoint1: React.Touch, oldPoint2: React.Touch): number {
-        let threshold = 4;
+        let threshold = 3;
         let oldDist = TwoPointEuclidist(oldPoint1, oldPoint2);
         let newDist = TwoPointEuclidist(pt1, pt2);
 
diff --git a/src/client/views/Touchable.tsx b/src/client/views/Touchable.tsx
index d0e3db8a5..5dcfec768 100644
--- a/src/client/views/Touchable.tsx
+++ b/src/client/views/Touchable.tsx
@@ -26,7 +26,8 @@ export abstract class Touchable<T = {}> extends React.Component<T> {
         }
 
         if (this.prevPoints.size) {
-            switch (e.targetTouches.length) {
+            console.log(e.targetTouches.length);
+            switch (this.prevPoints.size) {
                 case 1:
                     this.handle1PointerDown(e);
                     break;
@@ -67,35 +68,29 @@ export abstract class Touchable<T = {}> extends React.Component<T> {
                 if (this.prevPoints.has(pt.identifier)) {
                     this.prevPoints.set(pt.identifier, pt);
                 }
-                else {
-                    this.prevPoints.set(pt.identifier, pt);
-                }
             }
         }
     }
 
     @action
     protected onTouchEnd = (e: TouchEvent): void => {
-        console.log(InteractionUtils.GetMyTargetTouches(e, this.prevPoints).length + " up");
-        this._touchDrag = false;
-        e.stopPropagation();
-
+        // console.log(InteractionUtils.GetMyTargetTouches(e, this.prevPoints).length + " up");
         // remove all the touches associated with the event
-        for (let i = 0; i < e.targetTouches.length; i++) {
-            let pt = e.targetTouches.item(i);
-            if (pt) {
-                if (this.prevPoints.has(pt.identifier)) {
-                    console.log("delete");
-                    this.prevPoints.delete(pt.identifier);
-                }
+        for (let i = 0; i < e.changedTouches.length; i++) {
+            let pt = e.changedTouches.item(i);
+            if (pt && this.prevPoints.has(pt.identifier)) {
+                this.prevPoints.delete(pt.identifier);
             }
         }
+        this._touchDrag = false;
+        e.stopPropagation();
 
-        if (e.targetTouches.length === 0) {
-            this.prevPoints.clear();
-        }
 
-        if (this.prevPoints.size === 0 && e.targetTouches.length === 0) {
+        // if (e.targetTouches.length === 0) {
+        //     this.prevPoints.clear();
+        // }
+
+        if (this.prevPoints.size === 0) {
             this.cleanUpInteractions();
         }
     }